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Q: Why would my 1989 420 Mercedes stall on the freeway or upon acceleration? on 1990 Mercedes-Benz 420SEL

The fuel sensor in the "dash" area has been swapped. It's had a tune up.I happens after idle sometimes but also on the freeway. Very intermittent>
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have u changed the fuel filter, its the big round unit that sits at the rear passenger side of the car with the twin fuel pumps, it has a black plastic cover over the fuel pump assembly
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